US News – The pair made up just 1% of new coronavirus infections at the start of May. “A pair of highly transmissible omicron subvariants are deepening their hold on the U.S. According to updated data from the Centers for Disease Control and Prevention, BA.4 and BA.5 were responsible for 70% of new coronavirus cases last week. That’s up from 55% of cases the week before, when the pair became the dominant strains circulating in the U.S. While coronavirus infections have hovered around 100,000 on average each day for the past month and a half, many believe that number to be a significant undercount of the true spread. BA.4 and BA.5 are also spreading across the world. The World Health Organization last week reported an 18% increase in new, weekly coronavirus infections worldwide with BA.5 driving the most cases of any omicron subvariant…”